/*
 *  Copyright 2001-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package ar.uba.fi.posgrado.common.dao.impl;

import java.sql.SQLException;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.Expression;
import org.springframework.dao.DataAccessException;
import org.springframework.orm.ObjectRetrievalFailureException;
import org.springframework.orm.hibernate3.HibernateCallback;

import ar.uba.fi.posgrado.common.dao.AbstractDAO;
import ar.uba.fi.posgrado.common.dao.CustomerDAO;
import ar.uba.fi.posgrado.common.dao.DAOException;
import ar.uba.fi.posgrado.common.dao.NoSuchEntityException;
import ar.uba.fi.posgrado.economy.model.Customer;

/**
 * @see CustomerDAO
 * 
 * @author pablo.tortorella
 */
public class CustomerDAOImpl extends AbstractDAO<Customer> implements
		CustomerDAO {

	@SuppressWarnings("unchecked")
    @Override
	protected Class getClazz() {
		return Customer.class;
	}

	/**
	 * 
	 * @see ar.uba.fi.posgrado.common.dao.CustomerDAO#findByCorporateName(java.lang.String)
	 */
	public Customer findByCorporateName(final String corporateName)
			throws NoSuchEntityException, DAOException {
		Customer response = null;
		StringBuffer mensajeNoHayCliente = new StringBuffer(
				"No existe ningun Cliente con razon social: ");
		mensajeNoHayCliente.append(corporateName);
		try {
			response = (Customer) this.getHibernateTemplate().execute(
					new HibernateCallback() {
						public Object doInHibernate(Session session)
								throws HibernateException, SQLException {
							Criteria criteria = session
									.createCriteria(Customer.class);
							criteria.add(Expression.eq("corporateName",
									corporateName));
							return criteria.uniqueResult();
						}
					});
			if (response == null) {
				// Necesario ya q el criteria no falla al no encontrar
				throw new NoSuchEntityException(mensajeNoHayCliente.toString());
			}
		} catch (ObjectRetrievalFailureException e) {
			throw new NoSuchEntityException(mensajeNoHayCliente.toString(), e);
		} catch (DataAccessException e) {
			throw new DAOException(
					"Problema al buscar un cliente con Razon social: "
							+ corporateName + ". Mensaje: " + e.getMessage(), e);
		}

		return response;
	}

}
